This antique Ball Mason jar is a nice #7, XI base. Featuring a beautiful blue-green color and a Boyd's zinc lid, it is a half-gallon size and dates back to 1900-1911. The jar was made in the United States and is a wonderful addition to any collection of modern or vintage fruit jars. Perfect for storing small items or displaying as a decorative piece, this jar is a true gem for any collector. For any questions or additional images please contact me. Please see my other listings for more really great related items. I will combine shipping for multiple purchases.